A researcher conducted a study to examine the effect of sugar on activity level in rats. She predicted that when sugar is increased in the rats' diet, their activity level will also increase. Here is a diagram of her research design: Random sample of rats Measure activity level (Pretest) Introduce high sugar diet (IV) Measure activity level (Posttest) Below is a graph of her results: PS295 OC W2024 2
A. Does the pattern of the results support her hypothesis?
B. What is the formal name of her research design?
C. The researcher intends to prepare and submit her findings for publication. If you were assigned to review this research, would you have any concerns regarding the internal validity of the findings? Briefly explain why or why not.